TDA2030A TDA2030 Electronic Audio Power Amplifier Board Module Mono 18W DC 9V - 24V Computer Active Speakers DIY Kit
https://www.vogueparade.com/shopping/EN/4001/1/32899760627/tda2030a-tda2030-electronic-audio-power-amplifier-board-module-mono-18w-dc-9v-24v-computer-active-speakers-diy-kit//